CD1d-glycolipid tetramers: A new tool to monitor natural killer T cells in health and disease.

CD1d-glycolipid tetramers: A new tool to monitor natural killer T cells in health and disease.
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CD1D-糖脂四聚体:监测健康和疾病中天然杀伤细胞的新工具。

DOI:
10.1084/jem.192.5.f15
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发表时间:
2000-09-04
期刊:
The Journal of experimental medicine
影响因子:
--
通讯作者:
MacDonald HR
MacDonald HR
中科院分区:
其他
文献类型:
--
作者:
MacDonald HR

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一组主要的自然杀伤(NK)T细胞表达对脂聚糖-半乳糖基神经酰胺(-GalCer)特异的不变的V14 T细胞受体(TCR),其由CD 1d呈递。这些细胞可能具有重要的免疫调节功能,但由于缺乏合适的试剂在体内追踪它们,因此对其生物学的理解受到阻碍。在这里,我们表明,四聚体的小鼠CD 1d加载与GalCer是一个敏感的和高度特异性的试剂,用于识别V14 NK T细胞。使用这些四聚体,我们发现,GalCer特异性T淋巴细胞分布更广泛,比以前认识到,主要是NK 1的人口。1,但四聚体结合T细胞存在于淋巴结和肠。- GalCer的注射导致在2小时内通过肝脏和大部分脾脏中的几乎所有NK T细胞产生干扰素和白细胞介素4。这些细胞大多数在5小时内消失,1周后不再出现。奇怪的是,四聚体阳性的胸腺细胞不迅速合成细胞因子,也不经历脂质抗原刺激后细胞数量的减少,尽管它们表达相等的TCR水平。总之,本文提供的数据表明,-GalCer特异性NK T细胞经历独特的和高度区室化的抗原刺激反应。
A major group of natural killer (NK) T cells express an invariant V 14 T cell receptor (TCR) specific for the lipoglycan-galactosylceramide (-GalCer), which is presented by CD1d. These cells may have an important immune regulatory function, but an understanding of their biology has been hampered by the lack of suitable reagents for tracking them in vivo. Here we show that tetramers of mouse CD1d loaded with-GalCer are a sensitive and highly specific reagent for identifying V 14 NK T cells. Using these tetramers, we find that-GalCer–specific T lymphocytes are more widely distributed than was previously appreciated, with populations of largely NK1. 1 but tetramer-binding T cells present in the lymph nodes and the intestine. Injection of-GalCer leads to the production of both interferon and interleukin 4 by nearly all NK T cells in the liver and the majority of the spleen within 2 h. These cells mostly disappear by 5 h, and they do not reappear after 1 wk. Curiously, tetramer-positive thymocytes do not rapidly synthesize cytokines, nor do they undergo decreases in cell number after lipid antigen stimulation, although they express equivalent TCR levels. In summary, the data presented here demonstrate that-GalCer–specific NK T cells undergo a unique and highly compartmentalized response to antigenic stimulation.
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